You can maintain your knee joint by the following methods: 1, wear knee pads during sports: especially protect the patella to avoid patellar injury during basketball; 2, warm up the leg muscles of the lower limbs before sports: it can increase the temperature of the leg muscles and reduce the adhesion between the muscles, which can protect the knee joint well and avoid sprains of the knee joint; 3, adhere to the lower limb muscle exercises every day: such as The training can enhance the lower limb muscle strength and intensity, thus protecting and stabilizing the knee joint and avoiding serious injuries and excessive wear and tear on the knee joint during exercise.